Is my nute water supposed to look like this?

First time. In all the hours of research I have done I haven't seen discussions about nutrient water color and or film deposits. Please take a look at the pics and tell me if this is normal. The color didn't alarm me but the film on the pump, and I assume other parts in the system, makes me question my water. I cant imagine it's algae already. It is RO water, 500 PPM Cal Mag, 500ppm GH three part. It's been running for 3 days. I have already stressed my plants twice from pulling noob shit and I just got them healthy again.

I know I washed the vast majority of it but I had to buy a bag to complete the last 2 sites and I honestly don't remember if I washed that last 10 liter bag. Also I'm not sure how well the original ones were washed because for as long as I kept rinsing them there was still some runoff

Yeah, the more I look at it I think you're probably right. It definitely seems to be collecting near the bottom of the res like sediment. I think I'll leave it be for now, throw the filter on the pump and do a early res change in a few days just in case. Thanks for the input.

500ppm calmag??? That's where you're getting your piss yellow color from. You do not need any where near that much calmag, and depending on the ratio you are using with your GH 3-part you may not need any calmag period.

5 mil per gallon X 32 gallons in the system gave me 500 PPM in my RO water. I thought it was high too but everything I referenced confirmed the dosing rate of 5 ml per gallon in RO water and nothing about ppm's so I went with it. Did the math twice and poured once. I drained my res to confirm the clay issue and to clean it up. I left the sites full so I have 70% of the original nutrient mix still in the , should I transfer just pH water into the rez or the nutrient mix I transferred out? Or flush the whole system and start over?

I am fairly proficient at Learning and self-educating but s***, this is definitely harder than I thought it was going to be. Hopefully that means success will be that much more gratifying if I ever get there